Electronic device

1. An electronic device comprising: a main board to be housed inside of a casing; a shield case disposed at a surface of the main board so as to cover at least a part of a region of the surface of the main board; an auxiliary board disposed at a surface of the shield case, the auxiliary board having one or more component parts mounted on a surface of the auxiliary board, the one or more component parts include a socket into which a card is to be inserted; and a battery housed inside of the casing, and an end part of the battery prevents the card inserted into the card socket from slipping, wherein the shield case is constituted of a metallic frame that is fixed at the surface of the main board and extends in such a manner as to surround at least the part of the region, and a metallic cover fitted to the metallic frame to cover at least the part of the region; and wherein a projecting piece is formed at the metallic frame of the shield case in such a manner as to penetrate the metallic cover and project toward the auxiliary board, an end face of the auxiliary board abutting against the projecting piece, so as to position the auxiliary board.

2. The electronic device according to claim 1 , wherein the projecting piece of the metallic frame is molded integrally with the metallic frame.

3. The electronic device according to claim 1 , wherein a slit, into which the projecting piece of the metallic frame penetrates with a clearance, is formed in the metallic cover.